CodeLess AT+GAPSCAN finds nothing....

Hi Dialog Staff,

Thanks for your answer. Regarding your first question: yes, I can find my devices with another scanner. I took my Raspberry Pi and installed a BLE-scanner. Here is the result:

pi@raspberrypi:~ $ sudo blescan Scanning for devices... Device (new): 64:1c:b0:89:2b:0e (public), -94 dBm (not connectable) Manufacturer: <75004204018060641cb0892b0e661cb0892b0d01b91baea59500> Device (new): 28:39:5e:3f:79:8e (public), -48 dBm Short Local Name: '[TV] Samsung 5 Series (43)' Flags: <1a> Manufacturer: <7500420401014128395e3f798e2a395e3f798dff000000000000> Device (new): df:c7:96:0d:31:89 (random), -57 dBm (not connectable) Flags: <06> Manufacturer: <990405146e4272beeafc48010cff40adb6013940dfc7960d3189> pi@raspberrypi:~ $

As you see, it finds three devices, whereas my DA14531MOD_devkit finds none.

Regarding your second question checking with other DA14531 modules; we have ordered 10 pieces of DA14531 TINY Modules. I want to flash a few modules to test the AT+GAPSCAN function. I will try all three CodeLess fw. I shall report you about the result....

Thank you for your support.

Dear PM-Dialog,

Dear Sfuentes-digi,

Below I write in more details about CodeLessAT+GAPSCANissue. My problems at the beginning were the following:

1. It scanned nothing else but only other Dialog-peripheral devices
2. After receiving modification suggestion from Dialog it scanned much more peripheral devices. But it did NOT scan certain beacon devices I needed for telemetry data.
3. It did NOT show the actual raw-data where measurement data coded. It listed only addresses, types and RSSI data.
4. How to compile the project with Keil-demo license, even the original CodeLess project was too large for Keil linker.

Nr.1 solved: what Dialog suggested to leave outshow &&like:

if (show &&(param->report.evt_type == 0x00 || param->report.evt_type == 0x04)) // Only ADV_IND and SCAN_RESPONSE*/

to:

如果((param - >报告。evt_type = = 0 x00 | | param - >回购rt.evt_type == 0x04)) // Only ADV_IND and SCAN_RESPONSE*/

To solve Nr.2:

examining the code above it was clear thatparam->report.evt_typeis responsible what kind of advertising is accepted by AT+GAPSCAN. So, I was looking for another file which describes these types. It was really hard to locate the following header file:...\common\api\co_bt.h; Here the lines 1340-1355:

///Advertising HCI Type

enum

{

///Connectable Undirected advertising

ADV_CONN_UNDIR = 0x00,

///Connectable high duty cycle directed advertising

ADV_CONN_DIR,

///Discoverable undirected advertising

ADV_DISC_UNDIR,

///Non-connectable undirected advertising

ADV_NONCONN_UNDIR,

///Connectable low duty cycle directed advertising

ADV_CONN_DIR_LDC,

///Enumeration end value for advertising type value check

ADV_END

};

In this enumeration from 0x00-0x05 there are different types we can choose. So, I needed onlyADV_NONCONN_UNDIR(0x03 value) because the telemetry beacons advertise non-connectable undirected packets. You can read more about advertising types on:

https://www.novelbits.io/bluetooth-low-energy-advertisements-part-1/(scroll to the middle of the page…) So, I further modified the function to:

如果((param - >报告。evt_type == 0x03)) // Only ADV_NONCONN_UNDIR

Now all beacon devices were listed and others are filtered out.

The last problem: where is my raw-data what the beacons supposed to transmit like temperature, air-pressure, humidity, x-y-z acceleration, battery-voltage?

To solve Nr.3:

For this you need to further modify the function to

char adv_rep_str [260];/ * 40 * / / *源自原始* / /* "(%c) %02X:%02X:%02X:%02X:%02X:%02X,%c, Type: %s, RSSI:%d\r\n" */ /*changed*/ /* "(%c) %02X:%02X:%02X:%02X:%02X:%02X,%c, Type: %s, RSSI:%d\r\nRawData-length:\r\n %d\r\n" */ arch_sprintf(adv_rep_str, "(%c) %02X:%02X:%02X:%02X:%02X:%02X,%c, Type: %s, RSSI:%d, RawData-lenght:%d\r\n" " RawData(hex): %02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;" "%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X;%02X" "\r\n", codeless_service, param->report.adv_addr.addr[5], param->report.adv_addr.addr[4], param->report.adv_addr.addr[3], param->report.adv_addr.addr[2], param->report.adv_addr.addr[1], param->report.adv_addr.addr[0], address_type, type_str, param->report.rssi - 255, sizeof(param->report.data), param->report.data[0], param->report.data[1], param->report.data[2], param->report.data[3], param->report.data[4], param->report.data[5], param->report.data[6], param->report.data[7], param->report.data[8], param->report.data[9], param->report.data[10], param->report.data[11], param->report.data[12], param->report.data[13], param->report.data[14], param->report.data[15], param->report.data[16], param->report.data[17], param->report.data[18], param->report.data[19], param->report.data[20], param->report.data[21], param->report.data[22], param->report.data[23], param->report.data[24], param->report.data[25], param->report.data[26], param->report.data[27], param->report.data[28], param->report.data[29], param->report.data[30] ); send_to_local(adv_rep_str);

You see here the param->report.data[30] is the last byte in raw-data array. Of course, the original size of adv_rep_str[40] was not enough, it is now 260

char adv_rep_str [260];/* original 40*/

The above code is a bit ugly; I could have written in more elegant way in a loop, but it works, I do it later…

To solve Nr.4:I had a 30-day license from Keil which expired. I needed a way to reduce the code-size. See my previous topic:CODELESS Project Size Reducing - Problem Solved....

Here I found 2 linesuser_at_commands.hthat you can comment out to gain more room:

“//#define USE_AT_CONPARand//#define USE_AT_BND是有效的链接之后,代码大小代表orted is:27812(for codeless_531_datapump). So, I can compile the project now without extra Keil license.”

It was a long explanation, but I think you can solve your AT+GAPSCAN problem. The whole modified function I zipped and enclosed together with the scree-shot showing the result.

Thanks to Dialog for the support.

Good luck and good health!

Regards,

Janos N.